Above, Brian Stelter talks with Glenn Greenwald in his first interview since The Guardian and The Washington Post received the Pulitzer Prize for public service. Greenwald was a member of the Guardian team that reported on NSA mass surveillance programs using documents leaked by Edward Snowden last year.

Watch the full interview on Sunday, April 20th at 11am ET.

Read Brian's article to learn more about the other recipients of the Pulitzer prize for public service here.

About "Reliable Sources"

Now more than ever, the press is a part of every story it covers. And CNN's "Reliable Sources" is one of television's only regular programs to examine how journalists do their jobs and how the media affect the stories they cover.

Follow us on:

About the host

Brian Stelter is the host of "Reliable Sources" and the senior media correspondent for CNN Worldwide. Before he joined CNN in November 2013, Stelter was a media reporter for The New York Times. He is the author of the New York Times best-seller "Top of the Morning."